define([
  './AttributeCompression-8a5a065e',
  './Matrix3-fa806b97',
  './Math-dad82b4d',
  './Matrix2-1e403d0e',
  './createTaskProcessorWorker',
  './ComponentDatatype-cf1fa08e',
  './defaultValue-fe22d8c0',
  './Check-6ede7e26',
  './WebGLConstants-0b1ce7ba',
  './RuntimeError-ef395448'
], function (
  AttributeCompression,
  Matrix3,
  Math,
  Matrix2,
  createTaskProcessorWorker,
  ComponentDatatype,
  defaultValue,
  Check,
  WebGLConstants,
  RuntimeError
) {
  'use strict'

  const maxShort = 32767

  const scratchBVCartographic = new Matrix3.Cartographic()
  const scratchEncodedPosition = new Matrix3.Cartesian3()

  const scratchRectangle = new Matrix2.Rectangle()
  const scratchEllipsoid = new Matrix3.Ellipsoid()
  const scratchMinMaxHeights = {
    min: undefined,
    max: undefined
  }

  function unpackBuffer(packedBuffer) {
    packedBuffer = new Float64Array(packedBuffer)

    let offset = 0
    scratchMinMaxHeights.min = packedBuffer[offset++]
    scratchMinMaxHeights.max = packedBuffer[offset++]

    Matrix2.Rectangle.unpack(packedBuffer, offset, scratchRectangle)
    offset += Matrix2.Rectangle.packedLength

    Matrix3.Ellipsoid.unpack(packedBuffer, offset, scratchEllipsoid)
  }

  function createVectorTilePoints(parameters, transferableObjects) {
    const positions = new Uint16Array(parameters.positions)

    unpackBuffer(parameters.packedBuffer)
    const rectangle = scratchRectangle
    const ellipsoid = scratchEllipsoid
    const minimumHeight = scratchMinMaxHeights.min
    const maximumHeight = scratchMinMaxHeights.max

    const positionsLength = positions.length / 3
    const uBuffer = positions.subarray(0, positionsLength)
    const vBuffer = positions.subarray(positionsLength, 2 * positionsLength)
    const heightBuffer = positions.subarray(2 * positionsLength, 3 * positionsLength)
    AttributeCompression.AttributeCompression.zigZagDeltaDecode(uBuffer, vBuffer, heightBuffer)

    const decoded = new Float64Array(positions.length)
    for (let i = 0; i < positionsLength; ++i) {
      const u = uBuffer[i]
      const v = vBuffer[i]
      const h = heightBuffer[i]

      const lon = Math.CesiumMath.lerp(rectangle.west, rectangle.east, u / maxShort)
      const lat = Math.CesiumMath.lerp(rectangle.south, rectangle.north, v / maxShort)
      const alt = Math.CesiumMath.lerp(minimumHeight, maximumHeight, h / maxShort)

      const cartographic = Matrix3.Cartographic.fromRadians(lon, lat, alt, scratchBVCartographic)
      const decodedPosition = ellipsoid.cartographicToCartesian(cartographic, scratchEncodedPosition)
      Matrix3.Cartesian3.pack(decodedPosition, decoded, i * 3)
    }

    transferableObjects.push(decoded.buffer)

    return {
      positions: decoded.buffer
    }
  }
  var createVectorTilePoints$1 = createTaskProcessorWorker(createVectorTilePoints)

  return createVectorTilePoints$1
})
